/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.orc.writer;

import org.apache.flink.annotation.Internal;

import org.apache.hadoop.conf.Configuration;

import java.net.URL;

/**
 * Workaround for https://issues.apache.org/jira/browse/ORC-653.
 *
 * <p>Since the conf is effectively cached across Flink jobs, at least force the thread local classloader to avoid
 * classloader leaks.
 */
@Internal
public final class ThreadLocalClassLoaderConfiguration extends Configuration {
	public ThreadLocalClassLoaderConfiguration() {
	}

	public ThreadLocalClassLoaderConfiguration(Configuration other) {
		super(other);
	}

	@Override
	public ClassLoader getClassLoader() {
		return Thread.currentThread().getContextClassLoader();
	}

	@Override
	public Class<?> getClassByNameOrNull(String name) {
		try {
			return Class.forName(name, true, getClassLoader());
		} catch (ClassNotFoundException e) {
			return null;
		}
	}

	@Override
	public URL getResource(String name) {
		return getClassLoader().getResource(name);
	}
}
